Compositions possessing increased building tack on the basis of new rubber-like copolymers of ethylene, at least one other .alpha.-alkene and one or more polyenes
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United States of America Patent
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Apr 29, 1980
Issued Date -
N/A
app pub date -
Nov 19, 1976
filing date -
Sep 24, 1971
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Novel, rubbery copolymers of ethylene with at least one other .alpha.-alkene such as propylene, and a polyene such as 5-ethylidene norbornene-2, characterized by a differential scanning calorimetry thermogram maximum peak at a temperature between -7 and +11.degree. C., are disclosed. These specific rubbery copolymers when one or more tackifiers are included therein, exhibit an unprecedentedly high tack and consequently provide for the first time EDPM-type compositions that have sufficient building tack for the manufacture of multi-ply articles such as tires.
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